diff --git a/devtools/conda-envs/test_env.yaml b/devtools/conda-envs/test_env.yaml
index 45fe02a..9cf14da 100644
--- a/devtools/conda-envs/test_env.yaml
+++ b/devtools/conda-envs/test_env.yaml
@@ -9,7 +9,13 @@ dependencies:
   - pip
 
   # SEAMM
+  - molsystem
+  - numpy
+  - scipy
   - seamm
+  - seamm_util
+  - seamm_widgets
+  - tabulate
 
   # Testing
   - black
diff --git a/requirements.txt b/requirements.txt
index c774906..c9360a2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,7 @@
+molsystem
+numpy
+scipy
 seamm
 seamm-util
 seamm-widgets
+tabulate